I've done it a number of times over the past few years and was always asked for my ID at the Union. I also agree that those checking ID's don't look too hard, but if you're making a long trip, just find a student who's willing to walk up with their IDs and have them validate it for you.
"I love it that Ivy League coaches are coming to our camp and Big Ten coaches are coming to our camp. South Florida is coming. We've got about 70 schools that are coming to our camp."